Just found out they use Leotek IL6 LEDs, not the typical EOI ones. There's also a mismatched pedestrian signal at Front St W/York St/University Av. Must be from a York Region setup.
They're more common with poly signals lately. Especially with high damage rates from severe windstorms, like we just had in Buffalo this past February. Heck, along Main St. in the University area, there are both yellow and green signal housings in the same installation.